<html>
<title>test</title>
<body bgcolor="Silver">
  <audio id='audio1' src="audio.ogg" controls></audio>
  <script>
    var audio = document.getElementById('audio1');
    var mediaElement = audio;

    function playaudio() {
      mediaElement.play();
    }

    audio.oncanplaythrough = function() {
        document.title = 'ready_to_play';
    }

    audio.onended = function(e) {
        document.title = 'ended';
    }
  </script>
  <button id="button1" onclick="playaudio()">Click me</button>
</body>
</html>
